SKU: 94001023980

Power Driven 3K/4K Governor Springs

Sale price$153.00 Regular price$170.00
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Description

Power Driven 3K/4K Governor SpringsPower Driven 3K 4K Governor Springs 19941998 5. 9L 12v Cummins (P7100) Governor springs are widely considered the best bang for buck first mod on a 12v Cummins. The stock P7100 injection pump is governed to cut fuel well before the engine reaches its potential these springs raise that RPM ceiling, unlocking more power, sharper throttle response, and a noticeably different driving experience. One kit, one afternoon, immediate results. Kit Includes Full

Power Driven 3K/4K Governor Springs — 1994–1998 5.9L 12v Cummins (P7100)

Governor springs are widely considered the best bang-for-buck first mod on a 12v Cummins. The stock P7100 injection pump is governed to cut fuel well before the engine reaches its potential — these springs raise that RPM ceiling, unlocking more power, sharper throttle response, and a noticeably different driving experience. One kit, one afternoon, immediate results.

Kit Includes

  • Full set of 3K/4K governor springs
  • Spring bases (retainers) included

3K or 4K — Which Do You Need?

  • 3K (remove the center spring) — Raises the fuel cutoff to ~3,000 RPM. Safe for stock and mildly built engines. The right choice for most street and tow trucks. Better throttle response and power without pushing the engine beyond its limits.
  • 4K (leave the center spring in) — Raises the fuel cutoff to ~4,000 RPM. More aggressive, best suited for built engines with supporting mods (upgraded valve springs, head studs, turbo). Not recommended for stock motors.

⚠️ We strongly recommend installing heavy-duty 60lb valve springs if you plan on revving to 3,250 RPM or higher. Without them, stock valve springs can float at higher RPM and cause engine damage.

Fits

  • 1994–1998 Dodge Ram 2500 / 3500 5.9L 12v Cummins with P7100 injection pump

*May not work for all builds due to other engine/vehicle modifications.

Frequently Asked Questions

What do governor springs do on a 12-valve Cummins?

They raise the RPM limit of the mechanical P7100 injection pump, allowing the engine to rev higher and produce more power. It’s one of the most cost-effective performance modifications available for a 12-valve Cummins.

Will governor springs hurt my engine?

On a stock engine, 4K springs can accelerate wear. 3K springs are generally safe for stock or mildly built motors. We strongly recommend installing heavy-duty 60lb valve springs if you plan on revving to 3,250 RPM or higher.

Do I need any special tools?

Basic hand tools and mechanical knowledge are sufficient. Installation is straightforward — watch the install video below. Our optional Governor Spring Adjustment Tool makes the job easier if you plan to do it more than once.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 94001023980

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